U.S. patent number 8,154,799 [Application Number 12/385,761] was granted by the patent office on 2012-04-10 for 2d/3d switchable autostereoscopic display apparatus and method.
This patent grant is currently assigned to Samsung Electronics Co., Ltd.. Invention is credited to Yun-Tae Kim, Dong Kyung Nam, Du-Sik Park, Ju Yong Park, Gee Young Sung.
United States Patent |
8,154,799 |
Kim , et al. |
April 10, 2012 |
2D/3D switchable autostereoscopic display apparatus and method
Abstract
A two dimensional/three dimensional (2D/3D) switchable
autostereoscopic display apparatus and method. The 2D/3D switchable
autostereoscopic display apparatus and method may selectively
display a 2D image and 3D image using two displays, control a
display operated as backlight from among the two displays when
displaying the 2D image, and thereby may increase a contrast. Also,
the 2D/3D switchable autostereoscopic display apparatus and method
may output a 2D object and a 3D background using two displays.
Inventors: |
Kim; Yun-Tae (Suwon-si,
KR), Sung; Gee Young (Daegu-si, KR), Park;
Du-Sik (Suwon-si, KR), Nam; Dong Kyung
(Yongin-si, KR), Park; Ju Yong (Seoul,
KR) |
Assignee: |
Samsung Electronics Co., Ltd.
(Suwon-Si, KR)
|
Family
ID: |
41139305 |
Appl.
No.: |
12/385,761 |
Filed: |
April 17, 2009 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20100073768 A1 |
Mar 25, 2010 |
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Foreign Application Priority Data
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Sep 19, 2008 [KR] |
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10-2008-0092045 |
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Current U.S.
Class: |
359/463; 348/59;
359/462; 349/15 |
Current CPC
Class: |
H04N
13/359 (20180501); H04N 13/395 (20180501); G02B
30/28 (20200101); G02B 30/27 (20200101); H04N
13/305 (20180501); H04N 13/361 (20180501) |
Current International
Class: |
G02B
27/22 (20060101); H04N 13/04 (20060101) |
Field of
Search: |
;359/462,463 ;349/15
;348/59 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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2000-98350 |
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Apr 2000 |
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JP |
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2007-24969 |
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Feb 2007 |
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JP |
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2003-0036765 |
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May 2003 |
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KR |
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10-2006-0065069 |
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Jun 2006 |
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KR |
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10-2006-0096314 |
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Sep 2006 |
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KR |
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10-2006-0105351 |
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Oct 2006 |
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KR |
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2008-0000425 |
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Jan 2008 |
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KR |
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10-2008-0039039 |
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May 2008 |
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KR |
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10-2008-0051135 |
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Jun 2008 |
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KR |
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10-2008-0069869 |
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Jul 2008 |
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KR |
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2005/011291 |
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Feb 2005 |
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WO |
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Other References
US. Appl. No. 12/385,759, filed Apr. 17, 2009, Gee Young Sung, et
al., Samsung Electronics Co., Ltd. cited by other.
|
Primary Examiner: Chang; Audrey Y
Attorney, Agent or Firm: Staas & Halsey LLP
Claims
What is claimed is:
1. A two dimensional/three dimensional (2D/3D) switchable
autostereoscopic display apparatus, the apparatus comprising: a
display unit to include a first display and a second display, and
to output a hybrid 3D image through a lenticular lens located
between the first display and the second display; and a control
unit to control the first display and the second display to output
the hybrid 3D image, wherein the control unit separates an object
from a background in an image, controls the first display to output
the object by way of the lenticular lens to three dimensionally
display the object, and controls the second display to output the
background excluding the object two dimensionally in order to
output the hybrid 3D image where reduction of a resolution is
reduced, a background color of the object being white.
2. The apparatus of claim 1, wherein, when outputting the hybrid 3D
image, the control unit output a white background via the first
display and thereby controls the first display to be operated also
as backlight to provide the backlight to the lenticular lens, and
controls the second display to output an image of the background to
output a 2D background image, the second display being provided
with the backlight scattered through the lenticular lens.
3. The apparatus of claim 2, wherein, when outputting the 2D
background image, the control unit regionally controls a brightness
of the backlight, outputted through the first display, depending on
an artifact of the background.
4. The apparatus of claim 2, wherein, when outputting the 2D
background image, the control unit controls the first display to
output a backlight image with a line pattern to remove a line
artifact generated due to scattering by the lenticular lens, the
line pattern compensating for the line artifact.
5. The apparatus of claim 2, wherein the second display uses a
black and white panel, and, when outputting the 2D background
image, the control unit increases a frame rate of the 2D image by
up to three times, controls the first display to sequentially and
repeatedly output red, green, and blue backlights, and controls the
second display to output an artifact of the background
corresponding to each of the red, green, and blue backlights as
black and white to output a 2D background image of a color.
6. The apparatus of claim 1, wherein, when outputting the 3D hybrid
image, the control unit controls the second display to be operated
in a state where a region of the object is transparent, controls
the first display to output an image, and controls the lenticular
lens to refract light of the image to a plurality of viewpoints to
output a 3D object image.
7. The apparatus of claim 1, wherein the lenticular lens is angled
by a predetermined angle between the first display and the second
display to remove a moire pattern.
8. The apparatus of claim 1, wherein the first display corresponds
to any one of a Liquid Crystal Display (LCD), a Plasma Display
Panel (PDP), an Organic Light Emitting Diode (OLED), and a
Projection display.
9. The apparatus of claim 1, wherein the second display corresponds
to any one of a Liquid Crystal Display (LCD) and an Organic Light
Emitting Diode (OLED).
10. The apparatus of claim 1, wherein the lenticular lens refracts
light of an image provided from the first display to a plurality of
viewpoints and outputs.
11. A two dimensional/three dimensional (2D/3D) switchable
autostereoscopic display method, the image display method
comprising: receiving a request for an output of a 2D image, a 3D
image, or a hybrid 3D image; providing backlight to a lenticular
lens through a first display when the output of the 2D image is
requested; and outputting the 2D image through a second display
provided with the backlight scattered through the lenticular lens
when the output of the 2D image is requested, wherein, when the
output of the hybrid 3D image is requested, further comprises:
separating an object from a background in an image to be outputted
as the hybrid 3D image; outputting the object through the first
display, a background color of the object being white; and
outputting the background excluding the object through the second
display, wherein the object is three-dimensionally displayed and
the background is two dimensionally displayed to output the hybrid
3D image.
12. The image display method of claim 11, wherein a brightness of
the backlight is regionally controllable depending on an artifact
of an image.
13. The image display method of claim 11, wherein the backlight has
a line pattern to compensate for a line artifact to remove the line
artifact generated due to scattering by the lenticular lens.
14. The image display method of claim 11, wherein, when the second
display uses a black and white panel and the output of the 2D image
is requested, further comprises: increasing a frame rate of the 2D
image to be outputted by up to three times; outputting red, green,
and blue backlights through the first display sequentially and
repeatedly; and outputting an artifact of an image corresponding to
each of the red, green, and blue backlights as black and white
through the second display.
15. The image display method of claim 11, wherein, when the output
of the 3D image is requested, further comprises: maintaining the
second display to be transparent; outputting an image through the
first display; and refracting light of the image outputted through
the first display to a plurality of viewpoints through the
lenticular lens to output the 3D image.
16. The image display method of claim 11, wherein the lenticular
lens is located between the first display and the second
display.
17. The image display method of claim 11, wherein the lenticular
lens refracts light of an image provided from the first display to
a plurality of viewpoints and outputs.
18. The image display method of claim 11, wherein the first display
corresponds to any one of a Liquid Crystal Display (LCD), a Plasma
Display Panel (PDP), an Organic Light Emitting Diode (OLED), and a
Projection display.
19. The image display method of claim 11, wherein the second
display corresponds to any one of a Liquid Crystal Display (LCD)
and an Organic Light Emitting Diode(OLED).
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims the priority benefit of Korean Patent
Application No. 10-2008-0092045, filed on Sep. 19, 2008, in the
Korean Intellectual Property Office, the disclosure of which is
incorporated herein by reference.
BACKGROUND
1. Field
Exemplary embodiments relate to a two dimensional/three dimensional
(2D/3D) switchable autostereoscopic display apparatus and method,
and more particularly, to an image display apparatus and method
which may selectively display a 2D image or 3D image using two
displays.
2. Description of the Related Art
In general, a method using binocular disparity is used to display a
three dimensional (3D) image. A method using binocular disparity
may be divided into stereoscopy and autostereoscopy depending on
whether a user is required to wear glasses. A stereoscopy method
may include a method of using polarized glasses or a method using
Liquid Crystal (LC) shutter glasses. An autostereoscopy method may
include a method of using lenticular lens, parallax barrier,
parallax illumination, and the like.
A stereoscopy uses a polarized projector and is applied to a place
where a number of people watch, for example, a theater. An
autostereoscopy is mainly used for a game display, television,
display for presentation, and the like.
A 3D image display apparatus displays a 3D image as well as a 2D
image, and thus a 2D/3D switchable display technology is required.
A 2D/3D switchable display technology may include an
autostereoscopy method such as a method using a parallax barrier or
using a lenticular lens.
In a parallax barrier method, a viewpoint is separated using a
barrier in front of or at the back of display operating a pixel to
display a 3D image. A parallax barrier method may electrically
control turning on/off the barrier. Accordingly, when displaying a
3D image, a barrier may be used by turning on the barrier. When
displaying a 2D image, a barrier may be used in a transparent mode
by turning off the barrier. Although a resolution of a 2D image is
almost the same as in a 2D display, a luminance of a 3D image may
be significantly decreased since the parallax barrier method is for
displaying a 3D image.
In a lenticular lens method, an LC lens is used, and 2D/3D images
may be converted by controlling a refractive index of an inside and
an outside of the LC lens. When a refractive index of an inside of
LC lens is identical to that of an outside of LC lens, the LC lens
may not function as a lens, and is utilized in a 2D image display
mode. When the refractive indexes are different, the LC lens may
function as a lens, and is utilized in a 3D image display mode. In
a lenticular lens method, viewpoints are separated using an LC
lens, and thus a luminance of a 3D image may not decrease. However,
when a refractive index of an LC lens is not perfectly controlled,
the quality of 2D and 3D images may be deteriorated.
SUMMARY
Exemplary embodiments may provide a two dimensional/three
dimensional (2D/3D) switchable autostereoscopic display apparatus
and method which may selectively display a 2D image and 3D image
using two displays.
Exemplary embodiments may also provide a 2D/3D switchable
autostereoscopic display apparatus and method which may selectively
display a 2D image and a 3D image using two displays, control a
display operated as backlight from among the two displays when
displaying the 2D image, and thereby may increase a contrast.
Exemplary embodiments may also provide a 2D/3D switchable
autostereoscopic display apparatus and method which may three
dimensionally output an object and two dimensionally output a
background using two displays.
According to exemplary embodiments, there may be provided a 2D/3D
switchable autostereoscopic display apparatus, the apparatus
including: a display unit to include a first display and a second
display, and selectively output a 2D image or a 3D image through a
lenticular lens located between the first display and the second
display; and a control unit to control the first display and the
second display to selectively output the 2D image or the 3D
image.
When outputting the 2D image, the control unit may control the
first display to be operated as backlight to provide the backlight
to the lenticular lens, and control the second display to output
the 2D image. Here, the second display may be provided with the
backlight scattered through the lenticular lens.
When outputting the 2D image, the control unit may regionally
control a brightness of the backlight, outputted through the first
display, depending on an artifact of an outputted 2D image.
When outputting the 2D image, the control unit may control the
first display to output a backlight image with a line pattern to
remove a line artifact generated due to scattering by the
lenticular lens. The line pattern may compensate for the line
artifact.
When outputting the 2D image, the control unit may increase a frame
rate of the 2D image by up to three times, control the first
display to sequentially and repeatedly output red, green, and blue
backlights, and control the second display to output an artifact of
an image corresponding to each of the red, green, and blue
backlights as black and white.
When outputting the 3D image, the control unit may control the
second display to be operated in a transparent state, control the
first display to output an image, and control the lenticular lens
to refract light of the image to a plurality of viewpoints to
output the 3D image.
The control unit may separate an object from a background in an
image, control the first display to output the object, and control
the second display to output the background excluding the object to
output a hybrid 3D image where reduction of a resolution is
reduced. Here, a background color of the object is white.
The lenticular lens may be angled by a predetermined angle between
the first display and the second display to remove a moire
pattern.
The first display may correspond to any one of a Liquid Crystal
Display (LCD), a Plasma Display Panel (PDP), an Organic Light
Emitting Diode (OLED), and a Projection display.
The second display may correspond to any one of an LCD and an
OLED.
The lenticular lens may refract light of an image provided from the
first display to a plurality of viewpoints and outputs.
According to exemplary embodiments, there may be provided a 2D/3D
switchable autostereoscopic display method, the image display
method including: receiving a request for an output of a 2D image,
a 3D image, or a hybrid 3D image; providing backlight to a
lenticular lens through a first display when the output of the 2D
image is requested; and outputting the 2D image through a second
display provided with the backlight scattered through the
lenticular lens when the output of the 2D image is requested.
A brightness of the backlight may be regionally controllable
depending on an artifact of an image.
The backlight may have a line pattern for compensating for a line
artifact to remove the line artifact generated due to scattering by
the lenticular lens.
When the second display uses a black and white panel and the output
of the 2D image is requested, the image display method further
includes: increasing a frame rate of the 2D image to be outputted
by up to three times; outputting red, green, and blue backlights
through the first display sequentially and repeatedly; and
outputting an artifact of an image corresponding to each of the
red, green, and blue backlights as black and white through the
second display.
When an output of a 3D image is requested, the image display method
further includes: maintaining the second display to be transparent;
outputting an image through the first display; and refracting light
of the image outputted through the first display to a plurality of
viewpoints through the lenticular lens to output the 3D image.
When an output of a hybrid 3D image is requested, the image display
method further includes: separating an object from a background in
an image to be outputted; outputting the object through the first
display, a background color of the object being white; and
outputting the background excluding the object through the second
display.
The lenticular lens may be located between the first display and
the second display.
The lenticular lens may refract light of an image provided from the
first display into a plurality of viewpoints and outputs.
The first display may correspond to any one of an LCD, a PDP, an
OLED, and a Projection display.
The second display may correspond to any one of an LCD and an
OLED.
Additional aspects, features, and/or advantages of exemplary
embodiments will be set forth in part in the description which
follows and, in part, will be apparent from the description, or may
be learned by practice of the disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
These and/or other aspects of exemplary embodiments will become
apparent and more readily appreciated from the following
description, taken in conjunction with the accompanying drawings of
which:
FIG. 1 is a diagram illustrating a configuration of a two
dimensional/three dimensional (2D/3D) switchable autostereoscopic
display apparatus according to exemplary embodiments;
FIGS. 2A and 2B are diagrams illustrating an example of a section
of a display unit when outputting a 3D image, and an example of an
operation of outputting the 3D image according to exemplary
embodiments;
FIGS. 3A and 3B are diagrams illustrating an example of a section
of a display unit when outputting a 2D image, and an example of an
operation of outputting the 2D image according to exemplary
embodiments;
FIG. 4 is a diagram illustrating an example of an operation of
combining outputs of two displays and outputting a hybrid 3D image
in a 2D/3D switchable autostereoscopic display apparatus according
to exemplary embodiments;
FIGS. 5A and 5B are diagrams illustrating sections of a display
unit outputting a 2D image when a local dimming scheme is used and
when a local dimming scheme is not used according to exemplary
embodiments;
FIGS. 6A and 6B are diagrams illustrating an example of
compensating for a luminance non-uniformity that may be generated
when a 2D/3D switchable autostereoscopic display apparatus outputs
a 2D image according to exemplary embodiments; and
FIG. 7 is a flowchart illustrating a method of selectively
outputting 2D/3D images in a 2D/3D switchable autostereoscopic
display apparatus according to exemplary embodiments.
DETAILED DESCRIPTION
Reference will now be made in detail to exemplary embodiments,
examples of which are illustrated in the accompanying drawings,
wherein like reference numerals refer to the like elements
throughout. Exemplary embodiments are described below to explain
the present disclosure by referring to the figures.
FIG. 1 is a diagram illustrating a configuration of a two
dimensional/three dimensional (2D/3D) switchable autostereoscopic
display apparatus according to exemplary embodiments.
Referring to FIG. 1, the 2D/3D switchable autostereoscopic display
apparatus may include a control unit 100 and a display unit 110.
The display unit 110 may include a first display 112, second
display 114, and lenticular lens 116.
The first display 112 may output an image when outputting a 3D
image, and may be operated as backlight when outputting a 2D image
under control of the control unit 100. When a hybrid 3D image is
outputted, the first display 112 may output an object in colors and
a background in white backlight under the control of the control
unit 100 to reduce a resolution reduction. The first display 112
may correspond to any one of a Liquid Crystal Display (LCD), Plasma
Display Panel (PDP), Organic Light Emitting Diode (OLED), and
Projection display.
The second display 114 may output an image when outputting a 2D
image, and be operated in a transparent state when outputting a 3D
image under the control of the control unit 100. When the hybrid 3D
image is outputted, the second display 114 may output only a
background excluding the object under the control of the control
unit 100 to reduce a resolution reduction. The second display 114
may correspond to any one of an LCD, PDP, OLED, and Projection
display.
The lenticular lens 116 may be located between the first display
112 and the second displays 114. Pixels of the first display 112
may be displayed in a predetermined direction under the lenticular
lens 116. Specifically, the pixels of the first display 112 may be
outputted from a particular location to each of left and right eyes
of an observer. Accordingly, the observer may look at images from
two different viewpoints, and thus a 3D effect may be obtained.
That is, the lenticular lens 116 may refract light of an image to
the two, that is, left and right, viewpoints, and thus each of the
left and right eyes of the observer may observe different
images.
Here, a viewpoint may indicate a location of an observer observing
an object. The refracting of the light of the image may indicate
refracting light of an image to enable each different image to be
observed at a plurality of locations.
Also, the lenticular lens 116 is not perpendicularly located
between the first display 112 and the second display 114, and may
be angled by a predetermined angle between the first display 112
and the second display 114 to remove a moire pattern, as
illustrated in FIG. 2B and FIG. 3B. The moire pattern may be
generated when using two displays overlap each other.
The moire pattern may be an interference pattern created when two
grids are overlaid. Also, the moire pattern may be generated where
bright lines are overlapped among the bright lines, and dark lines
are overlapped among the dark lines. Also, the moire pattern may be
generated where a bright line is overlapped with a dark line.
Accordingly, when using overlapped displays, lines are continuously
connected and thus another moire pattern may be generated.
The control unit 100 may control the first display 112 and the
second display 114, and thereby may selectively output a 2D image,
3D image, and hybrid 3D image. Hereinafter, referring to FIG. 2
through FIG. 6, the control unit 100 and the display unit 220 when
outputting the 2D image, 3D image, and hybrid 3D image are
described in greater detail.
The display unit 110 when outputting the 3D image under the control
of the control unit 100 is described with reference to FIGS. 2A and
2B.
FIGS. 2A and 2B are diagrams illustrating an example of a section
of a display unit when outputting a 3D image, and an example of an
operation of outputting the 3D image according to exemplary
embodiments.
FIG. 2A illustrates the section of the display unit 110 when
outputting the 3D image. FIG. 2B illustrates an example of an
operation state when the display unit 110 outputs the 3D image.
The control unit 100 may control a second display 114 to be
operated in a transparent state when outputting the 3D image, as
illustrated in FIGS. 2A and 2B. Also, the control unit 110 may
control a first display 112 to output an image, and control a
lenticular lens 116 to refract light of the image to a plurality of
viewpoints to output the 3D image.
A luminance of the outputted 3D image may be different depending on
a type of the second display 114. When the second display 114 uses
a Red, Green, and Blue (RGB) color panel using red, green, and blue
colors, a transmissivity of a color filter is shown in Table 1.
Specifically, when outputting the 3D image through the first
display 112 and the lenticular lens 116, the second display 114 may
control every pixel value to be a white value. When the first
display 112 outputs 100% of white light, and the 100% of the white
light is passed to the second display 114, only 33% of the white
light is finally outputted.
TABLE-US-00001 TABLE 1 Color filter Red Green Blue Average
Transmissivity 15% 60% 23% 33%
Also, when the second display 114 uses a Red, Green, Blue, and
White (RGBW) color panel using red, green, blue, and white colors,
the second display 114 may control every pixel value to be a white
value. When the first display 112 outputs a 100% of white light,
and the 100% of the white is passed to the second display 114, only
50% of the white light is finally outputted.
When the second display 114 uses a black and white panel, a
transmissivity loss may not be generated. However, since the second
display 114 uses the black and white panel when outputting the 2D
image, the 2D image may be outputted in black and white, and be
applied to medical monitoring equipment, and the like.
However, the second display 114 using the black and white panel may
increase a frame rate of the 2D image by up to three times, and
output the 2D image in colors. For example, when an image available
in 60 Hz is operated in 180 Hz, the second display 114 using the
black and white panel may display the image in colors.
Specifically, when operating in 180 Hz, an image may be divided
into red, green, and blue images while displaying a single image,
and the three images may be separated in time. When the three
images are outputted, a human visual system temporarily merges the
divided images and recognizes as a single color image
That is, the second display 114 using the black and white panel may
output an artifact of an image corresponding to each of the red,
green, and blue images, in black and white. Also, the first display
112 may sequentially and repeatedly output red, green, and blue
backlights. Accordingly, the 2D image may be outputted in
colors.
The display unit 110 when outputting a 2D image under the control
of the control unit 100 is described in detail with reference to
FIGS. 3A and 3B.
FIGS. 3A and 3B are diagrams illustrating an example of a section
of a display unit when outputting a 2D image, and an example of an
operation of outputting the 2D image according to exemplary
embodiments.
FIG. 3A illustrates the section of the display unit 110 when
outputting the 2D image. FIG. 3B illustrates an example of an
operation state when the display unit 110 outputs the 2D image.
When outputting the 2D image, a control unit 100 may control a
first display 112 to be operated as backlight to provide the
backlight to a lenticular lens 116, and control the lenticular lens
116 to scatter the backlight provided from the first display 112,
as illustrated in FIGS. 3A and 3B. Accordingly, the control unit
100 may control the scattered backlight to be provided to the
second display 114, and control the second display 114 to output
the 2D image through the backlight.
The display unit 110 when outputting a hybrid 3D image under the
control of the control unit 110 is described in detail with
reference to FIG. 4.
When a 3D image outputted through the first display 112 is
refracted to a plurality of viewpoints through a lenticular lens
116, a resolution may be reduced as much as a number of viewpoints
of the 3D image.
FIG. 4 is a diagram illustrating an example of an operation of
combining outputs of two displays and outputting a hybrid 3D image
in a 2D/3D switchable autostereoscopic display apparatus according
to exemplary embodiments. In the hybrid 3D image, an object may be
separated from a background. The object is three dimensionally
displayed, and the background is two dimensionally displayed.
Accordingly, a resolution reduction due to a plurality of
viewpoints may be reduced.
A control unit 100 may separate the object from the background in
the image, control a first display 112 to output the 3D object, and
control a second display 114 to output the 2D background excluding
the object to output the hybrid 3D image. In this instance, a
background color of the object may be white. Accordingly, an
observer may be provided with the object of 3D image and the
background of the 2D image,
A display unit 110 when outputting the 2D image using a local
dimming scheme, for improving a contrast, under the control of the
control unit 100 is described in detail with reference to FIGS. 5A
and 5B.
FIGS. 5A and 5B are diagrams illustrating sections of a display
unit 110 outputting a 2D image when a local dimming scheme is used
and when a local dimming scheme is not used according to exemplary
embodiments. FIG. 5A illustrates the section of the display unit
110 when the local dimming scheme is not used when outputting the
2D image. FIG. 5B illustrates the section of the display unit 110
when the local dimming scheme is used when outputting the 2D
image.
Referring to FIG. 5A, when a second display 114 outputs a black,
white, and black pattern, the control unit 100 may control a first
display 112 to provide white light to a location corresponding to
each of the black, white, and black. In this instance, the white
light may be operated as backlight. Accordingly, even when a middle
pixel is outputted in white, the second display 114 may not display
the black pixel due to the white light.
Referring to FIG. 5B, when the second display 114 outputs a black,
white, and black pattern when using the local dimming scheme, the
control unit 100 may control the first display 112 to provide light
in the black, white, and black pattern at every pixel unit.
Accordingly, backlight is provided to a middle white pixel, and no
light is provided to pixels located left and right in the second
display 114. Accordingly, a pixel may be outputted in almost black
with a higher contrast than the example described with reference to
FIG. 2A.
The display unit 110 when outputting a 2D image where a
non-uniformity of a luminance is overcome under the control of the
control unit 110 is described with reference to FIG. 6.
FIGS. 6A and 6B are diagrams illustrating an example of
compensating for a luminance non-uniformity that may be generated
when a 2D/3D switchable autostereoscopic display apparatus outputs
a 2D image.
When outputting the 2D image in the 3D autostereoscopic display
apparatus, although a control unit 100 may control a first display
112 to provide full, uniform white light to a second display 114 as
illustrated in FIG. 6A, an undesired line artifact may be generated
in a direction of a lenticular lens 116 since the lenticular lens
116 is located in front of the first display 112. Accordingly, the
control unit 100 may control the first display 112 to provide a
backlight image with a line pattern instead of using the full,
uniform white light through the firs display 112, as illustrated in
FIG. 6B. In this instance, the line pattern is for compensating for
the line artifact. Accordingly, the 2D image may be outputted in a
uniform luminance.
Hereinafter, an image display method of the 2D/3D switchable
autostereoscopic display apparatus is described in detail with
reference to FIG. 7.
FIG. 7 is a flowchart illustrating a method of selectively
outputting 2D/3D images in a 2D/3D switchable autostereoscopic
display apparatus according to exemplary embodiments. Referring to
FIG. 7, in operation S700, the 2D/3D switchable autostereoscopic
display apparatus may receive a request for an output of an image.
When the request is received, the 2D/3D switchable autostereoscopic
display apparatus may determine whether a 2D image is requested to
be outputted in operation S702.
When an output of the 2D image is requested, the 2D/3D switchable
autostereoscopic display apparatus may control a first display 112
to be operated as backlight, control a second display 114 to output
the 2D image, and output the 2D image, in operation S704.
When outputting the 2D image in operation S704, a local dimming
scheme described with reference to FIGS. 5A and 5B may be used, or
a method of compensating for non-uniformity of luminance described
with reference to FIGS. 6A and 6B may be used.
Also, when outputting the 2D image in operation S704, a second
display 114 uses a black and white panel, the 2D/3D switchable
autostereoscopic display apparatus may increase a frame rate of the
2D image by up to three times, control the first display 112 to
sequentially and repeatedly output red, green, and blue backlights.
Also, the 2D/3D switchable autostereoscopic display apparatus may
control the second display 114 to output an artifact of an image
corresponding to each of red, green, and blue backlights as black
and white, in order to output the 2D image in colors.
When an output of a 3D image is requested as a result of the
determining in operation S702, it is determined whether an output
of a hybrid 3D image is requested in operation S706.
When it is determined that the output of the hybrid 3D image is not
requested as a result of the determining in operation S706, the
2D/3D switchable autostereoscopic display apparatus may control the
second display 114 to be in a transparent state, control the first
display 112 to output an image, and control a lenticular lens 116
to refract light of the image to a plurality of viewpoints to
output the 3D image.
When it is determined that the output of the hybrid 3D image is
requested as a result of the determining in operation S706, the
2D/3D switchable autostereoscopic display apparatus may separate an
object from a background in an image to be outputted in operation
S708. In operation S710, the 2D/3D switchable autostereoscopic
display apparatus may control the first display 112 to output the
object. In this instance, a background color of the object is
white. In operation S712, the 2D/3D switchable autostereoscopic
display apparatus may control the second display 114 to output the
background excluding the object. Specifically, in the method of
outputting the hybrid 3D image in operation S708 through operation
S712, images outputted through the first display 112 and the second
display 114 may be combined, and the 3D object and the 2D
background may be outputted. Accordingly, a resolution reduction
due to a plurality of viewpoints may be reduced, which has been
described with reference to FIG. 4.
The image display method of a 2D/3D switchable autostereoscopic
display apparatus according to the above-described exemplary
embodiments may be recorded in computer-readable media including
program instructions to implement various operations embodied by a
computer. The media may also include, alone or in combination with
the program instructions, data files, data structures, and the
like. Examples of computer-readable media include magnetic media
such as hard disks, floppy disks, and magnetic tape; optical media
such as CD ROM disks and DVDs; magneto-optical media such as
optical disks; and hardware devices that are specially configured
to store and perform program instructions, such as read-only memory
(ROM), random access memory (RAM), flash memory, and the like. The
computer-readable media may also be a distributed network, so that
the program instructions are stored and executed in a distributed
fashion. The program instructions may be executed by one or more
processors. The computer-readable media may also be embodied in at
least one application specific integrated circuit (ASIC) or Field
Programmable Gate Array (FPGA). Examples of program instructions
include both machine code, such as produced by a compiler, and
files containing higher level code that may be executed by the
computer using an interpreter. The described hardware devices may
be configured to act as one or more software modules in order to
perform the operations of the above-described exemplary
embodiments, or vice versa.
A 2D/3D switchable autostereoscopic display apparatus according to
the above-described exemplary embodiments may include a display
unit to include a first display and a second display, and
selectively output a 2D image or a 3D image through a lenticular
lens located between the first display and the second display; and
a control unit to control the first display and the second display
to selectively output the 2D image or the 3D image. Accordingly,
the 2D/3D switchable autostereoscopic display apparatus may output
a 3D image without luminance reduction and output a 2D image
without quality deterioration.
Although a few exemplary embodiments have been shown and described,
the present disclosure is not limited to the described exemplary
embodiments. Instead, it would be appreciated by those skilled in
the art that changes may be made to these exemplary embodiments
without departing from the principles and spirit of the disclosure,
the scope of which is defined by the claims and their
equivalents.
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